This high input impedance circuit was found in American documentation from the 1980s. The power supply must be symmetrical. The circuit applies to modern operational.
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This 50's receiver includes an amplifier stage with a transistor complementary to the CK722, in...
Found in Popular Electronics from the 90's, this circuit makes use of components from the time. |...